Public Health Emergency Of International Due to Zika Virus

Zika, a virus that barely bothered humans until last year, has been moving. First, it made its way from Africa to a series of tiny islands in Micronesia. Then it bounced back to the Pacific Ocean to Easter Island, off the coast of Chile. From there, it was on to Brazil. Now Zika has infected people in more than 20 countries in Central and South America and the Caribbean.